Punching-machine.



P. e. PATER. PUNCHING MACHINE.

APPLICATION FILED FEB. 8| l9l8- Patenfed Sept. -3, 1918 m'r'm n Pau/ 6P6779 Witnesses: Inventor M w. s

b J Attorney n4: mmms rnE/Is EO,PND1O uma. WA smucmm n c,

P. G. PATER.

' PUNCHING MACHINE.

APPLICATION FILED FEB. 8. I918 Patented ept. 3, 1918.

2 SHEETS-SHEET 2' Paw/6 Para" Inventor l/U. S &&

Attorney I Witness:

flaw-M PAUL 1G. PATER, OF HAMILTON,,OHIO, ASSIG'N'OR TO THE LONG &ALLSTATTER COM- 4 PANY, 0F HAMILTON, OHIO.

PUNCHING-MACHINE.

To all whom it may concern:

Be it known that I, PAUL G. PATER, a citizen of the United States,residing at Hamilton, Butler county, Ohio, have invented certain new anduseful Improvements in Punching-Machines, of which the following is aspecification.

This invention aims at mechanism designed to facilitate the accuracy ofpunching operations and will be readily understood from the'followingdescription taken in connection with the accompanying drawings in whichj l Figure 1 is a side elevation of a punching machine fitted with anexemplifioation of my invention;- 1 j Fig. 2a verticalsection ofportions thereof in the plane of line a of Figs. 3 and 4;

Fig. 3 a front elevation of the punch and its near accessories; and

Fig. 41 a horizontal section in the plane of offset lines 6 ofFigs. 2and3. l

In the drawings j 1, indicates the body of the punching machine; I

2, the vertically reciprocating ram thereof:

3, the camshaft. for reciprocating the ram: v

4, the punch:

.5,the die: '6, the stripper:

7, a faceplate on the body, forming the front guide-surface of the ra n:

' 8, the plate to bepunched: ,31

I 9, prick-punch marks in the plate at the centersofl-ocation of theholes to be punched in the plate:

10, a teaton the end of the punch, all of the parts thus far referred tobeing constructed substantially as usual, except as hereinafter stated,and subject to any of the usual modifications: r

11, a recess near the base of the ram: 12, the punch-stock carrying thepunch at its lower end and held in the base of the ram:

13, a collar on the upper end of thestock, the height of the collar andthe height of the recess 11 beingrelatively such that the stock may havesome degree of free reciprocating motion in the ram:

14, a block secured in the base of the ram, a semi-circular recess inthe rear face of this block and a semi-circular recess in the frontportion of the base of the ram to the I Specification of Letters Patent.

Patented Sept. 3, 1918.

Application filed February 8, 1918. Serial No. 215,946.

rear of the block forming a bore in which the punch-stock fits and:slides:

1d, stud projecting downward from the block:

15, a fork projecting from the punch-stock and freely straddling thestud:

16, an adjusting nut 011 the stud, below the fork: V l 17, the bolts forsecuring the block to the base of the ram, this block and boltarrangement being designed to furnish a convenience in assembling thepunch-stock and ram:

18, a pair of jaws pivoted to the top of the block and projecting intothe recess in the ram and adapted for such opening and closinginotion aswill adapt them to be free from the collar 13 or to swing in under theshoulder formed by the collar:

19, the pivots on which the jaws oscillate:

20, a stem having its rear end coupled to the two jaws:

'21, a T-shaped head on the inner end of this stem and engaging in slotsin the front ends of the jaws:

- 22, a lever disposed at the front of the faceplate and block andhaving its heel mounted on a pivot carried by the block:

22, a helical spring surrounding stud 20, its rear end engaging againstthe lever, stud 20 passing freely through the lever:

23, an adjusting nut on the stem, to serve in adjusting the tension ofspring 22*:

24, an inclined cam carried by the faceplate above the jaws:

25, a roller carried by the free end of the lever and adapted to "engagecam 2 1 and swing. the lever outwardly as the ram descends:

26, a spring stud carried by the block and projecting freely outwardthrough the lever and adapted to urge the lever rearwardly:

27, a setscrew passing through the lever and adapted to engage theblock:

28, the pivot on which the lever swings: and

29, the pivots connecting the jaws with stem 20, these pivots beinginward of the pivots 19 on which the jaws are mounted.

Giving consideration to Fig. 2, the ram is in its; uppermost position;the punch is resting on the plate to be punched; the teat is .in one ofthe punch marks of the plate; the plate may be shifted -about asdesired, the coned teat causing the punch all to rise, the teat droppinginto a selected prick-punch mark; the ram starts down; the punch remainsstationary supported by the plate; the roof of recess 11 eventuallyengages the top of the punch-stock; the rain continues its descent andthe punch is forced through the plate; the descent of the rain hasbrought the top of the open jaws below the level of the shoulder Hit thefoot of collar 13 the roller has engaged cam 24: and swung the leveroutwardly and closed the jaws under the collar; the ram rises; thepunclr stock and punch are pulled upward; the punchis withdrawn from theplate, which is held down by the stripper; the lever swings inwardly;the jaws release from under the collar; the punch-stock and punch maydescend by gravity; in the absence of the plate their descent would belimited by the engagement of the fork with nut 16 the parts are incondition "for the shifting of the plate fora new punching operation.

If, instead of the plate illustratecha thinne plate be put under thepunch then the teat would not reach the plate and the desired. feeling,on the'part of the operator, for the punch mark, could not 'beaccomplished. By adjusting nut 16 on its stud, the normal idle floatingposition of the punch, that isto sayfin the absence of a plate, may beadjusted to suit any thickness of plate within the capacity of thedevice. When the ram is up and a plate present, the punch is a floatingpunch, being supported by the plate when the plate is present, and beingsupported at the proper vertical height by the nut 16 when the plateabsent. The plate being absent, and the floating punch being supportedbynut l6,'the plate'may be inserted edgewise between thepunch and die,the'cone of the teat ele ating the punch a trifle and permitting thepoint of the teat to ride on'the plate.

From a study of Fig. 2, it will be apprehended'that the jaw arrangementconstitutes a let-go deviceyof aknown class, to drop the punch tofloating position after it has been raised sutliciently high for thestripping; that when the plate is present nut 16 is without otfice;-that when the plate'is absent, then the punch could drop too lowfor'the rednsertion of "the plate if thenut werenot prescut; that ifallplates were of the same thickness the nut wouldconstitute a supportingdevice and no adjustment of it would be needed; and that by reason ofits being a threaded agent it'becomes an adjustable sup porting deviceto prevent the punch from dropping so low as to preventthe convenientinsertion of anew plate, whatever the thickness of the plate adjustedfor, within the capacity of the adjustment.

The program of events which have been given, or the "result of theprogram rather,

would be brought about if the lever or stud 20 were operated by hand,but the cam and roller arrangement makes the operation of the jawsautomatic. The employment of block 1st provides a peculiarly convenientmeans for forming an openable bore to re the lever inwardly, while theoffice of spring 7 22 =ist0 render elastic the connection between thejaw s and the lever so as to provide for inaccuracies of constructionandmovement. For instance, if thisoonnection were not elastic it mightbe that the jaws-closed completely upon the punch-stock while the leverwas still-straining outwardly upon stud 20.

Ifit be desired to temporarily abandon the floating scheme it may bedone by adjusting set-screw 27 inwardly against the block until thelever is forced outwardly and :held permanently in a positioncorresponding with the closed position of the jaws un der the collar ofthe punch-stock, under which conditions the punch will partake ofsubstantially the full rising and falling motion of the ram. Thefloating scheme may be restored to 'activity by merely backing out thesetscrew 27 tothe idle position illustrated. \Vhen theiuvention isrealized in a vertically reciprocating punch, as illustrated, thegravity of the punclrstock ser es as the agent for pressing the idlepunch'to the surface of the plate being punched, or pressing the fork tothe -nut.16.when the plate is absent.

1. A punching machineeomprising, a reciprocatin'g ram,,-apunch-stockihaving a limited reciprocatingmiotion in the I'Etlllyttlldan adjustable supporting device disposed be tween the:punch-stockand theramand serving to adjustablylimit the :protrusion of the punch-"stockfrom the ram when jthereiisino plate present for the punch to floatupon, combined substantiallyas set forth.

2. Apunchingmachine comprising, a reciprocating ram, a punch-stockhaving a limited reciprocatingmotion in the ram, an adjustablesupporting device disposed between-thepunch-stock and the ram andserving to'adjustably limit the protrusion of the punch-stock fromtheram, a downwardly presenting shoulder formed upon thepunchstock, pivotedjaws carried by the ram and adapted *to open and close uponthepunchstock below'said shoulder. and means .for moving the jaws to openand closed position, combined substantially as set forth. I

3. A punching machine comprising, a re 'ciprocating. ram, a punch-stockhaving a limited reciprocating motion in the ram, an adjustablesupporting device disposed between the punch-stock and the ram andserving to adjustablylimit the protrusion of the punch-stock from theram, a downwardly presenting shoulder formed upon tliepunchstock,pivoted jaws carried by the ram and adapted to open and close upon thepunchstock below said shoulder, a pivoted lever ing to adjustablylimitthe protrusion of the punch-stock from the ram, a downwardly presentingshoulder formed upon the punchstock, pivoted jaws carried by the ram andadapted to open and close uponthe. punchstock below said shoulder, apivoted lever carried by the ram, an elastic connection between thelever and the jaws to open and close the jaws as the lever isoscillated, and means for locking the lever in position correspondingwith the closed position of the jaws, combined substantially as setforth.

5. A punching machine comprising, a reciprocating ram, a punch-stockhaving a limited reciprocating motion in the ram, an adjustablesupporting device disposed between the punch-stock and the ram andserving to adjustably limit the protrusion of the punch-stock from theram, a downwardly presenting shoulder formed upon the punchstock,pivoted jaws carried by the ram and adapted to open and close upon thepunchstock below said shoulder, a pivoted lever carried by the ram, anelastic connection between the lever and the jaws to open and close thejaws as the lever is oscillated, and a fixed cam carried. by theframe-work of the machine and adapted to vibrate the lever and close thejaws as the ram moves downwardly, combined substantially as set forth.6. A punching machine comprising, a reciprocating ram, a punch-stockhaving a limited reciprocating motion in the ram, an adjustablesupporting device disposed between the punch-stock and the ram andserving to adjustably limit the protrusion of the punch-stock from theram, a downwardly presenting shoulder formed upon the punch-stock,pivoted aws carried by the ram and adapted to open and close upon thepunch-stock below said shoulder, a pivoted lever carried by the ram, anelastic connection between the lever and the jaws to open and close thejaws as the lever is oscillated, a fixed cam carried by the framework ofthe machine and adapted to vibrate the lever and close the jaws astheram moves downwardly, and a spring connected with the lever andtending to urge the lever to position corresponding with the open position of the jaws, combined substantially as set forth. 1 I

7. A punching machine comprising, a reciprocating ram, a punch-stockhaving a limited reciprocating lnotion'in the ram, a stud carried by theram, an adjusting nut on the stud, and a fork carried by the punchstockand adapted to engage said nut to limit the protrusion of thepunch-stock from the ram, combined substantially as set forth.

8.'A punching machine comprising, a reciprocating ramhaving a recess inits base, a..block=secured against the lower portion of the ram andadapted in conjunction with the base of the ram to furnish a verticalbore for a'punch-stock, a punch-stock fitted to slide vertically in suchbore, and a collar on the upper end of the punch-stock to be engaged bythe roof of the recess in the ram in the course of the descending motionof the ram, combined substantially as set forth.

9. A punching machine comprising, a reciprocating ram having a recess inits base, a block secured against the lower portion of the ram andadapted in conjunction with the base of the ram to furnish a bore for apunch-stock, a punch-stock fitted to slide in such bore, a collar on theupper end of the punch-stock to be engaged by the roof of the recess inthe ram in the course of the descending motion of the ram, pivoted jawsmounted on the block and adapted to cooperate with the punch-stock, alever pivoted to the block, and a connection between the jaws and leverto cause the vibration of the lever to open and close the jaws, combinedsubstantially as set forth.

10. A punching machine comprising, a reciprocating ram, a punch-stockhaving a limited reciprocating motion in the ram, an adjustablesupporting device disposed between the punch-stock and the ram andserving to adjustably limit the protrusion of the punch-stock from theram, a downwardly presenting shoulder formed upon the punchstock,pivoted jaws carried by the ram and adapted to open and close thepunch-stock below said shoulder, a pivoted lever carried by the ram, anelastic connection between the lever and the jaws to open and close thejaws as the lever is oscillated, and a normally idle setscrew carried bythe lever and adapted to be adjusted to position to lock the lever toposition corresponding with the closed position of the jaws, combinedsubstantially as set forth.

11. A punching machine comprising, a die, a punch to cooperatetherewith, a reciprocating ram to push the punch through a plate andinto the die and to withdraw Tagit therefrom, a stripper to limit therising of the plate from the die as the punch is Withdrawing from theplate, a let-go device connecting the punch with the rain to cause thepunch :to rise with (the L'itl11 fl11(l-bl16l1l)6 released to descendand Heat upon the plnte, ends supporting device-carried by the rain andsewing to :limit the descent ofithe punch after release in the absenceof a ;plete,'-\vhe1 eby the releasedpunch may become :zu rested at adistance from the-die suliicient for the insertion of a plate between-l3l1G1I1,--COlTll)ll16Cl substantially as set forth.

12. A punching machine comprising, :a die, a -punch1to cooperatetherewith, a z1-eciproczitin'g F3111 to push the ,punch through aplateend into the die ztndito withdraw it therefrom, e stripper to limitthe rising of the plate from thedie as the punch is Withdrawing vfromthe plate, a letgo device connecting the punch With the I ELIHtO .eziusethe punch to .rise with the J'Zlniill'id then be released to descend andhost upon the plate,

may become arrested at an adjusted dis- Lance from :the die sufficientfot the insertion ofe platebetween them, combined substentiailly assetforth.-

PAUL TATE-R.

Witnesses:

PAUL SOUDDER, M. S. ,BELDEN.

(lopies of this patent may be obtained for five cents eaielnbyaddressing the Commissioner of Ia'tents,

Washington, D. C. i i

